【摘要】 土壤微量元素与人体健康息息相关.以土壤普查和人口普查数据为基础,运用GIS空间分析及SPSS数理统计方法,对湖北省县域尺度上土壤有效态微量元素空间分异特征进行分析,并对微量元素与人口健康相关性进行探讨.结论如下:1)县域尺度上Zn、B、Mo、Mn、Fe、Cu 6种土壤微量元素分布均存在明显空间聚集特征,B元素的Morans I值最大,其空间聚集性相对最好,Zn元素的Morans I值最小,空间聚集性相对最差;空间分布模式中以高值聚类(HH)所占比例最高,同时正热点区域比例均高于负热点区域,不同微量元素之间的正、负热点区域空间分布存在某些一致现象.2)县域尺度上人口健康水平分布存在明显的空间聚集特征,并非在整个区域内随机散发分布,长寿指数的集聚性要略高于死亡率,表明县域尺度上湖北省长寿人口分布相对较集中;长寿指数和死亡率的空间分布模式差异较大,同时发生高值或低值聚集的县域个数和空间位置呈现出不同分布特征.3)Mo和Cu两种元素与人口健康指标相关性达到显著性水平,表明其在一定程度上影响着区域人口健康状况;适量的Zn和Mn元素是已被证明有益于人体健康的微量元素,但在本次研究的县域尺度上进行相关性分析时,没有通过显著性检验.研究有利于深入认识土壤微量元素空间分异特征,为进一步开展土壤环境与人口健康的机理研究提供借鉴.更多还原

【Abstract】 Soil trace elements are closely related to human health.Based on the data of soil census and population census,the spatial differentiation of soil available trace elements on the county scale of Hubei Province was analyzed by using spatial analysis of GIS and mathematical statistics of SPSS,and the correlation between trace elements and human health was discussed.The results are as follows.1)There are significant spatial aggregation characteristics of soil trace elements including Zn,B,Mo,Mn,Fe and Cu on the county scale,and there is a difference in the degree of aggregation.The Moran’s Ivalue of the B element is the largest and the spatial clustering property is the best,while that of Zn element is the smallest and the spatial aggregation is the worst.The proportion of high value clustering(HH)in the spatial distribution pattern of soil trace elements is the highest,especially the B element.The proportion of hot spots in the distribution of trace elements is higher than that in the negative hotspots,and there are some similarities in the positive and negative hotspots between different trace elements in space.2)There are significant spatial aggregation characters in the distribution of population health on the county scale of Hubei Province,which are not distributed randomly in the whole area.At the same time,the spatial aggregation characteristic of the longevity index is slightly higher than the mortality rate,indicating that longevity population distribution is relatively concentrated on the county scale of Hubei Province.3)The correlation of Mo and Cu with the selected population health index on the county scale was significant,indicating that it affected the regional population health to a certain extent.Although Zn and Mn are trace elements that have been demonstrated to be beneficial to human health,the correlation between longevity index and mortality rate is not significant on the county scale in this study.This work is helpful to understand the spatial heterogeneity of soil trace elements and provide reference for further research on soil environment and population health.更多还原